Answer:
A. caste
Step-by-step explanation:
The caste system is a method for dividing society into classes based on religious beliefs.
The stratification of society occurs in this system based on the individual's birth in a certain household. The lowest castes are made up of the poorest households, who face economic hardships, social biases, and a bleak future because this structure prevents individuals from rising to higher castes.
In that instance, a person who is very motivated to enhance his economic and social status would be frustrated by a caste system. Because this system prevents people in economically and socially disadvantaged situations from improving their circumstances.
At the same time, I could be wrong, who knows. But I came to my conclusion through a little research.
Hope this helps!